3M 1100 Ear Plugs, Light Weight & Soft Foam for Comfortable Wear, Hearing Protection against noise levels in the range of 94-105 dB (SNR: 37dB), 30 on OnBuy
3M 1100 Foam Ear Plugs - Pack of 50 : Amazon.co.uk: Health & Personal Care
Disposable 3M 1100 Uncorded Earplugs (Box of 200 Pairs) | Safety Services Direct
3M 1100 Uncorded ear plugs, Pack of 30 | DIY at B&Q